Array Base Plate Parallel Electrode Lines Aperture Ratio
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Solution Overview
Problem
Capacitor-type touch panels with In Cell Touch technology face challenges in maintaining high transmittance and display effectiveness due to the placement of touch electrodes inside the display panel, which affects the aperture ratio.
Innovation Solution
The array base plate features a substrate with touch units and trace units, where the trace units include first and second electrode lines that intersect or overlap, connected in parallel, and are electrically connected to the touch units, allowing for reduced line widths and improved aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch electrodes are disposed inside the display panel using In Cell Touch technology, then touch functionality is achieved with low production cost and high stability, but the aperture ratio is reduced, deteriorating transmittance and display effect
Solution Approach 1:
The patent transitions from planar electrode arrangement to three-dimensional overlapping electrode lines. The first and second electrode lines intersect or overlap in the vertical direction, creating a trace unit that connects touch units without requiring large lateral space. This dimensional change allows the electrode structure to occupy less area while maintaining electrical connectivity, thereby improving aperture ratio without sacrificing touch functionality.
Solution Approach 2:
The patent embeds the first electrode line within or alongside the second electrode line, forming a nested structure where one electrode is positioned within the space of another. This nesting approach allows both electrodes to share the same spatial region, reducing the total area occupied by the electrode system and improving the aperture ratio while maintaining both touch and display functions.
2Reliability
If electrode lines are made wider to ensure electrical connectivity and reduce resistance, then touch sensitivity is improved, but the aperture ratio is reduced, worsening transmittance
Solution Approach 1:
Instead of increasing line width in the lateral direction, the patent utilizes the vertical dimension by creating overlapping electrode lines. The first and second electrode lines intersect or overlap in the direction perpendicular to the substrate, allowing electrical connectivity to be achieved through vertical stacking rather than lateral expansion. This reduces the area occupied by electrode lines while maintaining adequate electrical connection.
Solution Approach 2:
The patent creates a composite electrode structure where first and second electrode lines are combined in a trace unit. This composite arrangement allows the system to achieve the electrical properties of wider lines while physically occupying less space, as the overlapping configuration provides multiple parallel conduction paths within a compact footprint.
Data Source
AI summary
The array base plate includes: the plurality of touch units, wherein each of the touch units includes a plurality of sub-pixels arranged in an array; and each of the sub-pixels includes a first electrode; and a plurality of trace units, wherein each of the trace units includes a first electrode line and a second electrode line that at least partially intersect or overlap in a direction perpendicular to the substrate; the first electrode line includes at least one first parallel-connected part, and the second electrode line includes at least one second parallel-connected part; in each of the trace units, the first parallel-connected part of the first electrode line and the second parallel-connected part of the second electrode line are connected in parallel.